Vojnotehnicki glasnik / Military Technical Courier

581-592

Authors: Radić Vlado N.

Competitiveness in military industry is a very important sign that military products have market chance. In this way, quality management has a great impact on market behaviour, market status and overall industrial success. Military equipment and weapons/ammunition are specific products of high quality and price. The military industry in Serbia and Montenegro has potentials to place good products with international standards, with a lower price and short time of delivery. Products of military industry of good quality have the characteristics of reliability, durability and esthetics. Quality assurance management is a key factor in a new orientation to market conditions, to industrial success and optimum working and economic conditions.

603-610

Authors: Parlić Trojan, Bukarica Vladimir

A PC-based system for measuring radio-device characteristics is described in the study. Necessary prerequisites for the realization of such a system are state-of-the-art programmable instruments with standardized interfaces for PC connection, a PC and an adequate software enabling the control of instruments, analysis and data presentation and storage. The study also gives the advantages of automated measurement when compared to a traditional one as well as the fulfillment of certain requirements of standard JUS ISO 9001:2001 concerning quality management systems.

622-632

Authors: Filipović Miloš

A suitable kinetic model for the chemical transformations of stabilizer (diphenylamine, DPA) in single base gun propellants was investigated and successfully verified. This model assumes that the chemical transformations of stabilizer in single base gun propellants occur in three concurrent steps - each represents a complex reaction, whose kinetics can be described by reactions of shifting order. It was found that the experimental data were well evaluated by a first-order reaction at high concentrations of diphenylamine in the propellant, but by a zero-order reaction at low concentrations during the final phase of the propellant life cycle. The kinetic parameters of this model permitting prediction of chemical transformations of stabilizer in single base gun propellants at storage temperatures, were determined. The mechanism of diphenylamine chemical transformations was discussed with relation to the model and the ageing behavior of these propellants.

641-648

Authors: Tadić Goran

There are several methods to assess existing organizational solutions within a scientific work organization. Which one is to be applied depends on what part of the organizational structure is assessed. This study gives the methods employed for assessment of organizational elements based on the assessment of the organization level of the organization structure of transport and communication service for Land forces corps. The complete methodology of this study is shown on the example of organization of transport and communication service within corps operations.

445-457

Authors: Vidović Milorad, Miljuš Momčilo

In their wider sense, location problems are related to locating one ore more objects in the area of certain dimensionality. In narrower sense particularly in logistics, these problems are related to locating resources warehouses, terminals,... Hence, these are problems of locating points in the two dimensional space. This sounds logical since for example, warehouse dimensions, may be neglected in comparison with the area where the object is located. The location theory deals with formulation and solving location problems. Such problems may be classified with respect to: number of objects location type (discrete - continuous), criterions, tasks realized by the system, objective function types applied solution methods, etc. This paper is organized to present the basic concepts in the location theory, defining fundamental problems and proposing general approaches to their solution. Some of typically military applications are also discussed.

467-475

Authors: Đedović Branko, Jakić Branislav

Economically and military strong industrial and technologically developed countries face rising crises and challenges as reactions which impose the need of strengthening the quality factor in defense technologies as a demonstration of military force and technological supremacy. Being in the relation of cause and effect, defense technologies and modern strategies complement each other. Fast technological changes require design and programming of quality key parameters in order to achieve an optimum goal through the synergy of technology and tactics. The operational expression of basic quality parameters reflects in the logistic support prerequisites for combat actions as well as for efficiency and combat readiness criteria. The quality management system in defense technologies enables a high-quality description and a reliable prediction of mission realization.

484-496

Authors: Todorović Jovan

The energy sector has to be changed radically. New energy sources and new fuels are necessary. The solution of these serious problems is found in hydrogen, which is the best and widely available fuel. Undoubtedly hydrogen is a basis for a new "energy age", so-called "hydrogen age". To achieve that it is necessary to develop systems for hydrogen production, distribution and supply, i.e. a new infrastructure competitive with the existing one, has to be build.

508-518

Authors: Unković Milovan

This work describes the operation principle, construction and characteristics of a ship fiber- optic gyrocompass. Main differences in the operation of the gyrocompass and a classical one are considered as well as the fiber-optic gyrocompass characteristics, given according to ISO 8728 standard and compared to the characteristics of their classical counterparts.

528-533

Authors: Vujičić Vladimir

A contemporary preservation procedure consists of air-tightening equipment and maintaining humidity in an air-tight area below the threshold value of susceptibility to corrosion. Humidity of the atmosphere can be eliminated by static and dynamic procedures.

263-274

Authors: Mišković Vasilije

Since logistic support has not been defined in our country yet, this paper contributes in determining the notion by its differentiation and classification. The constituents and the general aim of logistic operation are pointed out as well as the objectives of its particular types. Conditions under which logistic operations are conducted, distribution of human and material resources, particularities of support and protection, are treated as well as logistic operation preparation, organization and realization.

285-294

Authors: Miljuš Momčilo, Vidović Milorad

Design of technological processes is one of the most complex tasks in the field of design in general. This type of design is also involved in logistic system design as these systems are typically very complex so that quality of design solution has a great influence on efficiency and economical level of logistic processes efficiency in practice. Loading/unloading and warehousing processes (LUWP) within some logistics systems, especially in material flows require specific efforts which complicate typical LUWP. Aiming to consider adequate realization of LUWP, this paper shows the methodology of design of these systems.

304-312

Authors: Jovanović Danko

Maintenance system elements are defined as well as the conditions under which their dislocation is performed. The criteria for the choice of location for maintenance unit dislocation are discussed. Maintenance units are treated as combat units which have to maintain a high level of readiness and be cost-effective at the same time.

321-330

Authors: Janković Radomir

The subject of the paper is computer simulation of ammunition consumption until the first hit in a sudden two-tank conflict. The first hit is important because it is often decisive in a two-tank conflict issue. The tanks are armed with different main weapons, one of which is a guided antiarmour missile, and the other is a classic gun which fires armour piercing rounds. The sudden conflict of tanks has been defined, starting assumptions have been given and the simulation model has been presented by means of the graphic representation of the platforms moving, mathematical transforms and algorithmic description. The model has been implemented by means of the GPSS World simulation language. The results of 10 experiments have been analyzed with various initial distances of the tanks in conflict.

344-355

Authors: Vučić Desimir

The extensive use of modern low probability-of-intercept digital communication signals, such as frequency hopping signals, requires development of new theory and algorithms for their reconnaissance for the purpose of constructing an electronic order of battle. This paper presents some principles and advances in signal processing and analysis technology for the signal interception, characterization, identification and exploitation in the context of electronic warfare.

367-378

Authors: Vujanović Miodrag, Begović Pavao, Erić Miljko, Ninić Stojan

Analyzing modern low level intensity wars and crises, we find some important characteristics that are similar or same for each one. The most dominant are combat actions in whole space without time limitations which means that, if you want to be successful in predicting enemy's activities, you continually need to know about enemy's activities in battlefield (people moving, moving of armor vehicles, artilleries and their positions, meteorological data etc). That kind of data is successfully obtained by passive multi-sensor systems dispersed in space of expected battle. We will introduce the philosophy of modern systems that are in use in NATO armies, activities of Military Technical Institute in realization of such a system named PRESEK and developing of new passive multisensor system with CCTV.

390-399

Authors: Đukanović Slaviša

Available military resources in any category are not critical in peace since they are tailored for military use under extreme conditions. However, some systems such as satellite communications, cannot meet extreme requirements during combat actions. The paper presents tactical and technical specifications and dynamic characteristics of commercial (INMARSAT. INTELSAT, IRIDIJUM,..) and military (DSCS, FLEET-SATCOM, NATO, SKYNET,..) satellite systems which are important for electronic warfare. The paper also gives available user services of contemporary satellite systems (Internet providing, videoconferences, live multi-media, fax, e-mail, voice). A new generation of broadband satellites, due to be operational this year, vill provide global rooming for these services to the INMARSAT satellite system which experiences a growing military use. Tendencies are that the services of satellite systems (communication, navigation, reconnaissance, meteorological ones,..) are to be put at disposal to lower tactical units, aircraft and even to each particular soldier. Knowing satellite systems of potential agressors enables the determination of satellite system weak points from the point of view of reconnaissance and jamming.

133-146

Authors: Stanojević Petar, Mišković Vasilije

The paper gives problems and methods of introducing contemporary maintenance strategies on the basis of worldwide experiences. The analysis of maintenance in our as well as in other military systems resulted in suggesting possible strategies, conditions of their application and possible combinations. The method of their implementation and application is analyzed as well as possible effects. Adequate recommendations are also given.

162-170

Authors: Jović Dušan

Reliability of aircraft and their systems and equipment is one of the most important problems which must be considered and analysed. This analysis is based on the number and periods of failures for the last few years and it describes the determination of the parameters of aircraft avionics reliability using certain graphic methods.

182-193

Authors: Nedeljković Ljubiša

Automatic and adaptive radio communication systems are developed to ensure better quality and easy link establishment and transmitting of messages over the HF radio channel. Automatic link establishment is a robust, adaptive HF radio method for automatic communications establishing over the HF SSB link. The overview of this technology, the principles of automatic link establishment and the analysis of conventional and adaptive radio systems are the contents of this paper.

206-210

Authors: Radetić Milorad

The possibility of a vehicle to accelerate is very important for special-purpose high-speed tracked vehicles, especially for combat vehicles. It determines vehicle dynamic characteristics and has an important role for vehicle survivability. The determination of basic vehicle acceleration parameters is mostly carried out experimentally on realized vehicles but for vehicles in development it is determined by calculation. Some problems are present during the calculation because it is not possible to take into account all influencing parameters. The procedure for an easy calculation of these parameters is given in this paper. The values of the parameters obtained by this procedure are close to real values.

216-223

Authors: Filipović Zoran, Tirnanić Šaša, Mitrović Gordana

Savremeni vazduhoplovi predstavljaju složene sisteme koje treba efikasno i u određenom roku ispitati sa osnovnim ciljem da se utvrdi kvalitet leta u opsegu proračunom datih ograničenja, performansi leta unutar projektovane anvelope i stabilnost i upravljivost u toku izvođenja zahtevanih manevara. Ispitivanja u letu mogu biti usmerena i ka istraživanju drugih fenomena koji se ne mogu ustanoviti na drugi način. Ispitivanje u letu je od presudne važnosti, a s obzirom na to da je to poslednja faza stvaranja letelice, jer se samo u realnim uslovima upotrebe mogu potvrditi svi inicijalni zahtevi projektovanja i verifikovati njene performanse uz maksimalno vođenje računa o bezbednosti ispitivanja. Ispitivanje u letu sprovodi se po tačno definisanom programu koji mora zadovoljiti veliki broj civilnih i vojnih vazduhoplovnih propisa. Specifičnost ove faze stvaranja letelice je u tome što obezbeđuje povratnu informaciju timu konstruktora o opravdanosti njihove procene ili daje prostor za alternativu u projektu. Pored toga, konstruktori stiču uvid u saglasnost projekta sa zadatim specifikacijama i ponašanju letelice u stvarnim uslovima aplikacije. Vazduhoplovni opitni centar u Batajnici spada u red savremenih opitnih centara. Pored vojnih aplikacija raspolaže i svim civilnim ovlašćenjima koja mu omogućuju tržišni nastup u zemlji i inostranstvu.

9-25

Authors: Borović Siniša, Tanašćuk Nevenka

In the last phase of a tender process, the Commission has a problem with choosing the best bidder, i.e. the one whose offer meets the highest requirements in the Tender documentation. A decision has to be made taking into account many different, and very often contradictory, criteria. For solving this one as well as similar problems, numerous methods, belonging to the multicriteria analysis and ranking, are developed. Taking in to account the characteristics of a problem imposed by choosing the bidder in a Tender process, one of the mentioned methods, the method of analytical hierarchy process (AHP) has been chosen as a basic method for ranking bidders. For the performed ranking control, the PROMETHEE I-II, method family is proposed.

37-48

Authors: Đukić Dragan, Mišković Vasilije

Spare parts supplies stocks have a significant influence on proper functioning of combat vehicles in military operations. The form and quantifying of change of military vehicle readiness dependence on spare parts supplies will be recognized by applying the method of modelling and simulation. The basic factors influencing the readiness of combat vehicles are as follows: supply system structure, supply level for a given structure and probability of being supplied by spare parts at all supply levels. The most important result of the research is the knowledge of the basic factors influence, particularly the spare parts supplies influence on the combat vehicle readiness in military operations.

58-66

Authors: Ristić Zoran

This work presents some common forms of the orifice area in hydraulic recoil brakes and their basic characteristics. The analysis of the fluid flow coefficient and the flow resistance coefficient is performed for various geometry surface areas on the basis of experimental data. The methodology of determining the flow resistance coefficient and its influence on the hydraulic braking force has been given.

75-86

Authors: Gligorijević Radinko, Jevtić Jeremija, Borak Đuro

In the current decade of this millennium automobile manufacturers must achieve an additional twofold increase in fuel efficiency and a tenfold reduction of emission of CO2 and pollutants, especially NOX and particles. To achieve this goal, a new specification of engine lubricants, whose contribution to fuel efficiency and reduction of emissions cannot be neglected, is to be developed. Development trends in lubricants move towards low viscosity, low content of sulfur, phosphorus, sulfate ash and low volatility, resulting in emission reduction and increase of fuel efficiency.